Sunan ad-Darimi

Yahya bin Ja'dah said: A written shoulder bone was brought to the Prophet Muhammad (peace be upon him). He (peace be upon him) said: "It is sufficient misguidance for a people that they show indifference to what their Prophet has brought, and turn to another Prophet instead of their own Prophet, or turn to another book instead of their own book." And in support of this, Allah the Exalted revealed this verse: «﴿أَوَلَمْ يَكْفِهِمْ أَنَّا أَنْزَلْنَا عَلَيْكَ الْكِتَابَ يُتْلَى عَلَيْهِمْ إِنَّ فِي ذَلِكَ لَرَحْمَةً وَذِكْرَى لِقَوْمٍ يُؤْمِنُونَ﴾» [عنكبوت: 51/29] "Is it not sufficient for them that We have sent down to you the Book which is recited to them? Indeed, in it is mercy and a reminder for a people who believe."